.table-of-contents {
    background: #fff;
    border: 1px solid #ddd;
    border-radius: 4px;
    margin-bottom: 12px;
}

.content-title-left {
    padding: 12px 16px;
    background: #f8f9fa;
    border-bottom: 1px solid #ddd;
    font-weight: 600;
    font-size: 14px;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.content-title-left:hover {
    background: #f0f1f3;
}

.content-title-left .title {
    margin: 0;
    font-size: 14px;
    font-weight: 600;
}

.hide-content-title-left {
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: #666;
}

.hide-content-title-left:hover {
    color: #333;
}

.content-body {
    max-height: 400px;
    overflow-y: auto;
}

.content-body.collapsed {
    display: none;
}

.content-body::-webkit-scrollbar {
    width: 8px;
}

.content-body::-webkit-scrollbar-track {
    background: #f1f1f1;
}

.content-body::-webkit-scrollbar-thumb {
    background: #ccc;
    border-radius: 4px;
}

.content-body::-webkit-scrollbar-thumb:hover {
    background: #bbb;
}

.toc-list {
    list-style: none;
    margin: 0;
    padding: 0;
}

.toc-item {
    border-bottom: 1px solid #f0f0f0;
}

.toc-item:last-child {
    border-bottom: none;
}

.toc-item:hover {
    background: #f8f9fa;
}

.toc-link {
    display: block;
    padding: 8px 16px;
    text-decoration: none;
    color: #333;
    font-size: 13px;
    line-height: 1.4;
}

.toc-link:hover {
    color: #0066cc;
}

.toc-link.active {
    color: #0066cc;
    font-weight: 600;
    background: #f0f8ff;
}

.toc-number {
    color: #666;
    margin-right: 8px;
    font-weight: 500;
}

.toc-text {
    display: inline;
}

.toc-level-1 .toc-link {
    padding-left: 16px;
    font-weight: 500;
}

.toc-level-2 .toc-link {
    padding-left: 32px;
    font-size: 12px;
}

.toc-level-3 .toc-link {
    padding-left: 48px;
    font-size: 12px;
}

.toc-level-4 .toc-link {
    padding-left: 64px;
    font-size: 11px;
}

.toc-level-5 .toc-link {
    padding-left: 80px;
    font-size: 11px;
}

.toc-level-6 .toc-link {
    padding-left: 96px;
    font-size: 11px;
}

@media (max-width: 768px) {
    .table-of-contents {
        position: static;
        margin-bottom: 16px;
    }

    .content-body {
        max-height: 300px;
    }

    .toc-level-1 .toc-link {
        padding-left: 12px;
    }

    .toc-level-2 .toc-link {
        padding-left: 24px;
    }

    .toc-level-3 .toc-link {
        padding-left: 36px;
    }

    .toc-level-4 .toc-link {
        padding-left: 48px;
    }

    .toc-level-5 .toc-link {
        padding-left: 60px;
    }

    .toc-level-6 .toc-link {
        padding-left: 72px;
    }
}

.toc-loading,
.toc-empty {
    padding: 12px;
    text-align: center;
    color: #666;
    font-style: italic;
    font-size: 13px;
}